SIOV Metal Oxide Varistors

B72220W/R*

ThermoFuse Varistors, NT series

NT20 series

PPD VAR PD

2018-10-09

Please read Cautions and warnings and

Page 16 of 19

Important notes at the end of this document.

Cautions and warnings

General

1.

EPCOS metal oxide varistors (SIOVs) are designed for specific applications and should not be used for

purposes not identified in our specifications, application notes and data books unless otherwise agreed with

EPCOS during the design-in-phase.

2.

Ensure suitability of SIOVs through reliability testing during the design-in phase. The SIOVs should be

evaluated taking into consideration worst-case conditions.

3.

For applications of SIOVs in line-to ground circuits based on various international and local standards there

are restrictions existing or additional safety measures required.

Storage

1.

Store SIOVs only in original packaging. Do not open the package before storage.

2.

Storage conditions in original packaging:

Storage temperature:

-25 °C … +45 °C

Relative humidity:

<75% annual average,

<95% on maximum 30 days a year.

Dew precipitation:

Is to be avoided.

3.

Avoid contamination of SIOVs surface during storage, handling and processing.

4.

Avoid storage of SIOVs in harmful environments which can affect the function during long-term operation

(examples given under operation precautions).

5.

The SIOV type series should be soldered within the time specified.

SIOV-S, -Q, -LS

24 month

T, ETFV and NT types

12 month.

Handling

1.

SIOVs must not be dropped.

2.

Components must not be touched with bare hands. Gloves are recommended.

3.

Avoid contamination of the surface of SIOV electrodes during handling, be careful of the sharp

edge of SIOV electrodes.